When the car fault light is on, you should immediately park the car in a safe area and do not affect other vehicles to check the fault. Engine fault light is sometimes a false fault, depending on your resolution.,There are many reasons for the engine to turn off the fault light, but among the many causes of engine failure, there are many discharge faults and unaffected operational faults.

    Reasons for emissions failure: Poor quality of gasoline, resulting in emissions testing is not up to standard; air quality is not good, carbon deposits are formed too early; oxygen sensor damage; spark plug or nozzle failure leads to insufficient combustion.

    Reasons for unaffected operational failures: The fuel tank cap is not covered; after the throttle valve is cleaned, it is not cleared by the computer; after the modification or repair, a plug is not inserted; the inexplicably bright engine fault light and so on. If it is a discharge failure, the mixture will not burn enough and the power will be slightly insufficient. And if it is an unaffected operation failure, it does not have much or no effect on the driving. When the engine is on, the fault light can be observed. If it is a major fault, it will be accompanied by the engine's powerlessness, large jitter, high water temperature, and multiple faulty lights on the instrument panel. At this time, it is necessary to stop the car and wait for the professional rescue. If only the engine fault light is on, the rest are normal, then you can run it for a while without stopping, and some will be automatically eliminated. If you don't eliminate it, you can open it to the repair site to solve it.